Oscillation generator



May' 24, 1932.

K.OKABE oscILLATIoN GENERATOR Filed June 13. 192# Patented May 24, 1932 UNITED STATES-PATENT ori-fiele:

IINJIBG OKABE, OF SENTAI, iTAPAN, ASSIGNOR T GENERAL ELECTRIG COMPANY, .A f CORPORATION 0F NEW YORK v OSGILLATION GnNEnA'ron v I Application led June 13, 1928, Serial No. 285,008, and 4in- Japan July 1, 1927. i 4

My invention relates to high frequency oscillation generators, and it has for one of its objects to provide'improved means for generating oscillations of ultra short Wave 5 length.

jamounts of power m of ultra high provide i novel Another object of the invention is to provide means lfor producing considerable the form of'oscillations4 frequency. Still another object of the invention is to 4 electron discharge apparatus of Construction rwhich is particularly adapted for use in connection with the pro- My present invention is an improvement l upon the invention disclosed in my former Japanese patent whereby a considerably greater amountfof high frequency energy is produced. This increase/in energy results essentially from longitudinally slitting the anode cylinder into a plurality -of segments arranged symmetrically around the cathode and connecting these segments through a tion together with .thereby off-the .high freqency oscillations.

claims.` My invention itself, however,

source of potential and conductors upon which the ultra short wave oscillations are roduced to the cathode.v 1I have found that ysuitably adjusting these conductors that a eircuitmay be'provided which is Vresonantat the frequency of the oscillations produced still further increasing the intensity The novel feaes which I believe to be characteristic vof my present invention'are set forth with particularity in the appeldedl ot as to its organization and method of operafurther objects and advanltages thereof may best be understood by refereice `to the following description taken in lby means of connection with ther accompanying drawings 1n whiclrFig. l represents an end view of -the electron discharge device employed in connection with myvinvention; Fig. 2 represents a side view thereof; Fig. 3 represents a modification; Fig. 4 represents a circuit arrangement which may be employed, and Fig. 5 represents a system of antennaefor radiating oscillations produced by means such as thatshown in Fig.4 4.

Referring to the drawings the electron discharge apparatus which comprises anim-` portantpart of my invention comprises a Vessel containing a plurality of anodes l which are arranged upon opposite sides'of a ....cathodeF'extending through the vessel.

These anodesare of curvilinear form and are symmetrically arranged with respect to the cathode to form segments -ofv a cylinder, as shown in Figs. 3 and 4, the lfilament extending along the axis of the cylinder. f

These anode segments are connected together by means of conductors P, which as shown in Fig. 4 extend a.- suitable distance outside of the vessel and are then ljoined together andl connected to one of two parallel conductors One. of the parallel conductors is connected to. one side'of the Vcathode and the otherparallel conductor is connected through a source of anode potential .to the cathode., The two parallel conductors are also connected together at a Asuitable point Bymeans v vessel containing the anodes ll5 and which' 'is energized with unidirectional current, .a 'substantially uniform magnetic field isl produced within the discharge device the lines of force of which extend 4parallel with the axis of the cylinder formed by the anodes P.

It has been found that withl Va certain high that if the fiel current is'increased abovea certain critical value that high frequency oscillations are produced upon the conductors P and W having a wave length of thev order of a fraction of a meter.. By adjusting .the

adjusting the -point at which the condenser a short circuiting condenser C. of a coi1.M which surrounds the Y unidirectional' otential applied to the anodes ment and in the instrumentalities employed,

C is connected Vbetween the conductors W, the external circuit may be made to resonate with the frequency of the oscillations produced and a considerable increase in the intensity .-5 of oscillations produced upon the parallel conductors may be noted.

It has been found that a material increase in output energy results from' splitting the anode in the manner indicated. While the.

conductors P connect the anodes these-'conductors are of sufficient length to permit the anodes to operate separately. This length is such that this increase in output energy is noted and such that the external circuitv may be adjusted to resonate with't-he frequency of oscillations produced by adjusting the dis-A tensity of the high frequency oscillationsproduced upon the parallel conductors may be increased by increasing the capacity coupling to this conductor by attachin a plate member A thereto, as shown in the gure.

For the purpose of radiating oscillations of the type produced upon the parallel conductors the means shown in Fig. 5 may be emplo Y exten ing radiating conductors E each .of which has a length equal to one-half of a wave length of the oscillations produced and which are connected at the omts upon the parallel conductors at which the potential loops of the standing wave occur. YAs thus arranged these conductors will radiate a space Wave having-the frequency of the oscillations produced in a `direct1on at right angles to the plane comprising the conductors E or, in other words, at right angles to the plane of thedrawings. E and the spacing of these conductors along the parallel conductors hasbeen indicated in Fi 5, A representing the wave length.

` ile I have shown a particular embodiment of my invention it will be understood by those skilled in the art that many changes and modifications, both in the circuit arrangemay be made Without departing from -my invention, .and I therefore aim in the appendedclaims to cover all such changes and mod fications as fall within'the true spirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. The combination, in an oscillation generator, of an electron'discharge device comprising a cathode, a plurality of plate-like A, anode members arranged around and substantially enclosing said cathode, means for producing almagnetic lield between said mem- 05 Vbers and parallel with said cathode, a con.-

ed. This means comprises oppositely The length ofthe conductorsY 'between said cathode and connection,

nection between eachof said members Vand said cathode including a' source of potential and a connection between said members whereby high frequency oscillations'are produced, said last connection being variable to affect the oscillations produced.

2. The combination, in an oscillation generator, of an electron discharge device comprising a cathode, a-plurality of plate-like anode members arranged symmetrically around and substantially enclosing said cathode, a connection between said anode mein-` bers, means connected between said cathode and connection for impressinga positive potentia-l on said anode members, means for .proso ucing unidirectional magnetic ield between. said members and parallel with said cathode whereby high frequency oscillations are produced, said connection being adjustable to provide a resonant circuit at the frequency of oscillations produced. i

3. In a high frequencyoscillation generator,'an electron discharge device having an anode structure in the forinof a cylinder said cylinder being longitudinally slitted to form a pair of separate oppositely disposed anode segments, an electron emitting cathode extending along the axis of said cylinder,

means for producing a substantially uniform v unidirectional' magnetic lield parallel with said cathode, an adjustable connection between said anodes for varying the output* `V`from said "generator, and means connected betweenisaidggnnection and said1 cathode fo impressing a positvevpotentia upon sai mo anodes. f Ryn Y 4. In a high frequency oscillation general tor, an electron discharge devicevhaving ,an

anode structure in the form of a cylinder, said cylinder being lcngitudinall slitted to forma pair of` separate oppositel1 disposed Vanode, segments, a cathode exten 'ng alongthe'axis of said cylinder, means for producing a substantially uniform unidirectional magnetic field parallel with said cathode, an 1m' adjustable connection between said anodes, means Afor impressing.- an electromotive force a air of parallel conductors extending from aid connection andcathode, a connection for high frequency currents between said conductors and a radiating vsystem connected to said conductors. I 'f- V 5. The combination, in an oscillation generator, `of anelectron discharge device comu prising a cathode, a plurality of plate-like anode members arranged around and substantially enclosing said cathode, means for between said last connection'and said cathode l Vwhereb a circuit resonant at the frequency of osci ations produced is provided. 6. An electron dischar e device including an envelope, -a cathode aapted to emitelec-` trons extending within said envelope, an anode structure within said envelo e comprising a plurality of plate-like mem ersextending adjacent said cathode, conductors connected re'spectively. to said anode members and co ected to each other externalto said envelope, and means for producin a magnetic field in the space between sai catho e and anode members. In testimony whereof I have fixed my signature. l

KINJIRO OKABE, 

